package net.sourceforge.phpdt.internal.compiler.ast;

import java.util.List;
import java.util.ArrayList;

/**
 * A Function call.
 * @author Matthieu Casanova
 */
public class FunctionCall extends AbstractSuffixExpression {

  /** the function name. */
  public Expression prefix;

  /** the arguments. */
  public Expression[] args;

  public FunctionCall(final Expression prefix,
                      final Expression[] args,
                      final int sourceEnd) {
    super(prefix.sourceStart, sourceEnd);
    this.prefix = prefix;
    this.args = args;
  }

  /**
   * Return the expression as String.
   * @return the expression
   */
  public String toStringExpression() {
    final StringBuffer buff = new StringBuffer(prefix.toStringExpression());
    buff.append('(');
    if (args != null) {
      for (int i = 0; i < args.length; i++) {
        final Expression arg = args[i];
        if (i != 0) {
          buff.append(',');
        }
        buff.append(arg.toStringExpression());
      }
    }
    buff.append(')');
    return buff.toString();
  }

  /**
   * Get the variables from outside (parameters, globals ...)
   * @return the variables from outside
   */
  public List getOutsideVariable() {
    return new ArrayList(1);
  }

  /**
   * get the modified variables.
   * @return the variables from we change value
   */
  public List getModifiedVariable() {
    if (args == null) {
      return new ArrayList(1);
    }
    final ArrayList list = new ArrayList();
    for (int i = 0; i < args.length; i++) {
      list.addAll(args[i].getModifiedVariable());
    }
    return list;
  }

  /**
   * Get the variables used.
   * @return the variables used
   */
  public List getUsedVariable() {
    final List list = prefix.getUsedVariable();
    if (args != null) {
      for (int i = 0; i < args.length; i++) {
        list.addAll(args[i].getUsedVariable());
      }
    }
    return list;
  }
}